Datasheet

383
ATmega640/1280/1281/2560/2561
2549K–AVR–01/07
Table 171. ADC Characteristics, Differential Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution
Gain = 1x 8 Bits
Gain = 10x 8 Bits
Gain = 200x 7 Bits
Absolute Accuracy(Including INL, DNL,
Quantization Error, Gain and Offset Error)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
18
(17)
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
17 LSB
Gain = 200x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
9LSB
Integral Non-Linearity (INL)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
2.5
(2.0)
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
5
(4)
LSB
Gain = 200x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
9LSB
Differential Non-Linearity (DNL)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
0.75
(0.5)
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
1.5
(1.0)
LSB
Gain = 200x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
10
(9)
LSB
Gain Error
Gain = 1x 1.7 %
Gain = 10x 1.7 %
Gain = 200x
0.5
(0.2)
%
Offset Error
Gain = 1x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
2
(1)
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
2
(19
LSB
Gain = 200x
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200 kHz
3LSB
Clock Frequency 50 200 kHz
Conversion Time 65 260 µs